.Cigarrete smoke doesn't appear so smoothly on film... Have you ever actually seen cigarrete smoke on film? When you see it you can see the deeper which contrast with the more whispy white depending on the density of the amount of smoke in a particular area. ..I can't say if it's a real anything but it's not cigarrete smoke. I've a number of candid photo's from parties that show myself exhailing cigar smoke and my fiance his cigarrete smoke if you'd like to see the difference between this and that...

mist, smoke, water droplet on the lense, a bug close up to the camera, lint or dust close to the camera. This could be many things. I think this leans towards one of the things i have listed rather than paranormal. The road looks wet, there could be many things flying around in the air due to the crash, im assuming many people such as police and paramedics, bystanders etc. Mnay environmental factors. More than there is paranormal. I rule this one not paranormal.